Apparatus for cleansing castings.



C. A. PETERSON.

APPARATUS FOR CLEANING CASTINGS.

APPLICATION FILED JAN.2. 1915'.

1,1 59,707. Patented Nov. 9, 1915.

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WITNESSES INVENTOR L'arl 25. fleierzi'urz.

f4 M I C. A. PETERSON.

APPARATUS FOR CLEANING CASTINGS.

APPLICATION FILED JAN. 2, 1915. I 1,1 59,707. Patented Nov. 9, 1915.

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w HIM 1 a g .J 8 E .1 W m M W 9 2 UNITED STATES PATENT OFFICE.

CARL A. PETERSON, OF CHICAGO, ILLINOIS, ASSIGNO'R TO. AMERICAN BRAKE SHOE FOUNDRY COMPANY, OF MAHWAH, NEW JERSEY, A

APPARATUS ron CLEANSING cnsrmos.

Specification of letters Patent.

CORPORATION OF NEW JERSEY.

Patented Nov. 9, 1915,

' Application filed January 2. 1915. SeriaI No. 52.

To all whom it may concern f Be it known that I, CARL A. PE'mRsoN, a

citizen of the United States, anda resident in the county of Cook and State been a serious problem in foundries, and.

more especially in those wherein a large number of relatively small castings are produced. The elimination ofthe greater part of the manual labor ordinarily expended in the breaking up of the molds and cleansing of-the castings, will therefore materially decrease the cost of castings.

One of the prime objects of the present invention is the provision of mechanical means whereby the contents of a mold orflask may be forcibly ejected and deposited upon a rotating grate for the separation of the sand and castings, and cleansing of the latter, as well as, its subsequental delivery to a conveyer. A further object is to provide a mechanism adapted to engage the outstanding lugs of the drag of a mold and by the applica-' discharge to a suitable conveyer.

A further object is to provide a conical grate for the reception and cleansing of the contents of molds and to so mount the grate,

that castings may be dropped directly therein and will gradually work their way toward the lower and open extremity of the grate, for their discharge upon a suitable conveyer. I Further objects and advantages will appear as the description proceeds, wherein it is understood that changes in the precise embodiment of the invention can be made Within the scope of what is claimed, with- The preferred embodiment, of'my inven out departing from the spirit of the invention. e

tion is, illustrated in the drawings, in

which Figure 1 is a view in top plan of 'the-ap- 1 paratus embodying'my invention. Fig. 2

-is aview of the foregoing, partially in sideelevation, and partially in section, and illustratlng by full and dotted lines the several positions of the flask engaging and casting ejecting member. Fig. v3 is a view inlongitudinal section of the casting ejecting mem- .ber, illustrating the same supporting a mold and with the various parts in position prior to the ejection of the mold contents. Fig. 4 is a view in top plan ofthe casting ejecton,

Referring more particularly to the several views, wherein similar reference numerals a delivery conveyer 6 is adapted to conduct of a. rotating grate 8. The grate is substantially frusto-conical in configuration and includes the end rings 9 and 10, between, and to which, the grate bars 11 are secured. Suitable rollers 12 are mounted upon the inclined shafts 13, and rotatably supportthe frusto-conical grate in an inclined position, the grate sloping downward toward its smaller open extremity. A chain 14:, or analogous power transmitting means, is connected to one of the shafts 13, providing for the mechanical actuation of the grate.

A swinging boom 15 projects outwardly from a wall or support 16 and constitutes an overhead track upon which a carriage 17, including a wheel 18, is movably mounted. An ejector and flask engaging member 19 is rigidly secured to and depends from the carriage 17, and is of the pneumatic type, including the cylinder 20, and piston 21. A piston rod 22 is rigidly secured to the piston 21, projects through the upper end23 of the cylinder and is rigidly secured at its upper extremity to, or formed as a part of, the carriage 17 The remote ex'treinity of .the piston rod projects throughthe lower cylinder end 2 1, and carries the head or'block25. Thus, as air or steam under pressure is admitted to the cylinder above the piston 21, from the supply pipe 26,the cylinder will designate corresponding parts throughout,

be forcibly raised and maintained in' n,

- constituents.

elevated position until such time as the three-way controlling valve 27 is moved into a position in which the pressure supply is closed, and the cylinder brought into communication with the exhaust pipe 28.

Pivotally secured to the lower end 24 of the ejector cylinder are the grappling arms 29, bent intermediate their ends, and provided at their lower extremities with the fingers 30, so designed and arranged as to engage the outstanding lugs 31, with WhlCll the flasks are ordinarily provided. The grappling arms extend to both sides of their pivotal mountings, and are provided with the links 32, connecting their free ends. A handle 33 projects from one of the grappling arms and provides for their convenient manipulation, allowing the grlpplng fingers to be readily brought into engagement with the flask lugs.

The overhead track or boom 15 is so situated that it may swing directly above the rotating frusto-conical grate, as illustrated in Fig. 1, allowing portions of the e ector to swing within the upper and open extremlty of the grate, to thus insure that the casting, discharged from the flask, will enter the grate and be separated from. the other mold The rotatin of the grate results in the tumbling and cleansing of the casting, its seperation from the sand, and its discharge from the lower andopen extremity of the grate upon a conveyer 34, located therebelow. I

As the delivery conveyer brlngs a hot mold in front of the rotating grate, the operator, by a suitable manipulation of the handle 33 and controlling valve 27, swings the ejector into position. The threeway valve 27 is then opened, resulting in the admission of pressure within the cylinder and the forced raising thereof, and in so doing, the ejector is allowed to swing into the position illustrated in full lines in Fig. 2. As the ejector cylinder rises, the mold is brought into forcible contact with the head 25,. and a further elevation thereof causes the mold to move above the said head 25, resulting in the forced ejection of the contents thereof; the casting and sand dropping intothe open extremity of the frusto-conical grate above which the ejector'has previously swung. The'obliquity of the grate axis results in the inclination of the plane of the upper open extremity of the grate, which allows the casting to drop directly therein. The obliquity of the axis is relatively greater than that of' the sidewalls of the grate, so that a downward slant will also be present in the lower side walls of the grate, whereby the castings will gradually work their way toward the lower discharge. extremity of the grate, as they are tumbled about therein. From the foregoing, it will for engaging a mold and adapted horizontal adapted to be apparent that hot molds may be successfully handled, and their contents conveniently and quickly discharged, the castings although still in a heated condition being delivered or discharged directly into a suitable mechanism, wherein they are cleansed of the mold sand; the action being almost entirely automatic and allowing a large number of molds to be treated in a relatively short time and with the expenditure of little manual labor.

What I claim is 1. An apparatus of the class described comprising a member adapted to engage and raise a mold, means carried by said member adapted to eject the contents therefrom, and an inclined rotatable grate with open extremities adapted to receive said. mold therein for the direct discharge of the contents of said mold into said grate.

2. An apparatus of the class described comprising a flask engaging member, means carried by said raise said flask and eject the contents thereof, and a rotatably mounted frusto-conical grate with open extremities, the axis of said grate disposed at, an angle to the horizontal providing for the vertical discharge of the flask contents into said grate, the upper open extremity of said grate adapted to receive said flask therein.

' 3. An apparatus of the class described comprising a delivery conveyer, an ejector mounted thereabove and includin means to elevate the same, means carried by said ejector adapted to discharge the contents of said the elevation thereof, and an mold during open-ended rotatably mounted grate with the axis thereof inclined at an angle to the receive the contents of the mold therein as the ejector swings thereabove. 4:. An apparatus of the class described comprising a deliveryconveyer, an ejector mounted thereabove and including means for engaging a mold and adapted to elevate the same, means carried by said ejector adapted'to discharge the contents of said mold during and by virtue of the elevation thereof, and an open-ended rotatably mounted grate with the axis thereof inclined at an'angle to the horizontal adapted to receive the contents of the mold therein as the-ejector swings thereabove, and a conveyer located beneath the lower dischargeextremity of said grate adapted to receive the castings as they are discharged fromv said grate.

5. An apparatus of the class described 1 comprising a substantially frusto-conical grate including end rings; spaced bars extending therebetween; means engaging these rings rotatably supporting the Same and mounting said grate in an inclined position, the obliquity of the axis being greater than the obliquity of the sides, and means for delivering castings to the open upper ex- 5 tremity of said grate.

Signed at Chicago in the county of Cook and State of Illinois this eighteenth day of December A. D. 1914;

CARL A. PETERSON. Witnessesi S. D. WITKOWSKI, W. G. CHIEFS. 

